Cardboard or paper box and method of preparing the same



Aug. 12, 1930. E. J. SCHOETTLE I 1,773,064

CARDBOARD 0R PAPER BOX AND METHOD OF PREPARING THE SAME Filed June 22, 1926 dextrine, or at least one of these products, and material of which the box is :formed,'its

fumes coming frompaste "or from the cardtures of the invention. When for example it.

Patented Aug. 12, 1930 I UNITED S ATES im'raNroFFica EDWIN J. scnon'r'rnn, or PHILADELPHIA, PENNSYLVANIA- cnnnnonnn on, PAPER Box nun Mnrnon or rnnrnnme 'rian SAME Application filed June 22,1926." Serial No. 117,852. I

This invention relates to improvements in found that I many varieties of commercial cardboard or paper containers. 4 cardboard used-for boxes are on the alkaline. Certain products normally kept or sold in side, and give off of themselves traces of ampaper containers or boxes are adversely ,afmonia, and that these tracesare increased by. 6 fected by actinic light, the oxygen of the airthe use of pastes, particularly those containand by reaction with certain alkaline fumes ing casein.- I therefore bring my size to a given off by many commercial cardboards distinct acid reaction, but 'one not sufliciently and papers of which the aforesaid containers strong to injure substancescontained in the are made. Rubber goods for example which box; and since the aluminum sulphate he'- f 10 often are kept for considerable lengths of time comes a neutral salt on drying, thereis no, are adversely afiected both by actinic light easily communicable acid. I r and oxygen of the air, while worsted and In addition to this, I may or may not add other yarns which also generally are conto the mixture a trace of orange or yellow tained in pasteboard boxes are frequently ,color, and for this purpose I have successful- M 5 discolored by ammonia fumes emanating in ly used a mixture of tartrazine and ponceau minute amount from the materials-of which R; It is, however, practically immaterial the box is composed and the adhesives emwhat color is used'so long as it is water soluployed in their manufacture. This also apble and not affected by the aluminum sul plies to many forms of knit and other goods. phate. The aforesaid pigment, which is 20 It is the object of the present invention to orange-yellow i'ncolor, is capable of shutting provide cardboard or paper containers which out a large proportion of theactinic li ht may be used for such goods, for example, as rays. Obviously this color may be mod' ed. mentioned above with assurance that deteriin the direction of red satisfactorily, as both oration from the cited causes will be either the red and orange rays are practically non- 25 entirely eliminated or reduced to a minimum. actinic. v

The drawings illustrate a container treated As a specific example of size made in acin accordance with my invention. 'cordance with this invention, I may cite the] My invention consists inthe use of a suitfollowing formula: able size, preferably in theform of soluble Soluble potato starch, 100 grams; paper 39 starches or dextrine, mixtures of soluble makers alum, 10grams; water to make 1000 3 starches and dextrine, or suitable gums such 0. c. of size. as gum acacia, so constituted and compound- Also as previously stated, may add to this ed with other elements as-to provide, when mixture suflicient tartrazine and ponceau R. applied to the cardboard or paper containers, to give a pronounced orange-yellow color to v 35 preferably on the inside, a protective film or the composition, f

coating which will'tend to exclude. or neu- A size made in accordance with'this for- Y tralize the deteriorating elements. I may mula is highly satisfactory by reasonof a for example use starch that has been more or slight but sufiicient acidity,ato neutralize less hydrolized, producing soluble starch, and possible ammonia fumes emanating from the to this soluble starch I may add ordinary power to largely exclude the actinic rays aluminum sulphate or any acid reacting salt which may adversely afiect the contents of the such, for example, as ferrous sulphate. box, and by reason further that in one coat Aluminum sulphate, however, is preferable applied to the inside of the container a very 4 by reason of the fact that it is colorlessl The dense film is obtained which is practically aluminum sulphate is usedprimarily as a air-proof." means for. giving a moderate acidity to the 'The size is capable of some modification mixture-so that it can neutralize ammonia without departure from the essential feaboa-rd used in forming the container. I have is' known that the contents of the container will not he afi'ected by the possible slight ammonia fumes emanating as previously described, the slum may be eliminated, and whereon the other hand the. actinic rays are 5 not objectionable, the size may bemade Withoiit the aforesaid dyes. F or general use, how, ever, a size made as described will be highly satisfactory and generally desirable for coating the insides of all boxes or paper conrm 'tainers as a warranted precaution.

I claim:

1. The method of treating the exterior of paper boxes and the like, which comprises applyingto the inner surfaces of the contain- 5 er a film-forming-size of slight acidity and containing a non-actinic dye substance.

2. The method of treating the exterior of paper boxes and the like, which comprises applying to the inner surfaces of the con- 20 tainer a film-forming size of sli h't acidity.- EDWIN J. SC OETTLE. 

